Texas Instruments TMS320TCI648x User Manual
Page 62
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Descriptor
Descriptor
Buffer
Buffer
Port RX DMA
state
RX queue head descriptor
pointer
SRIO Functional Description
Figure 24. RX Buffer Descriptors
TX Buffer Descriptor
TX_DESCP0_0->TXDESC0 =
CSL_FMK( SRIO_TXDESC0_N_POINTER,(int )TX_DESCP0_1 );
//link to
TX_DESCP0_1
TX_DESCP0_0->TXDESC1 =
CSL_FMK( SRIO_TXDESC1_B_POINTER,(int )&xmtBuff1[0] );
//Buffer
Pointer
TX_DESCP0_0->TXDESC2 =
CSL_FMK( SRIO_TXDESC2_DESTID, 0xBEEF)
|
CSL_FMK( SRIO_TXDESC2_PRI, 1)
|
CSL_FMK( SRIO_TXDESC2_TT, 1)
|
CSL_FMK( SRIO_TXDESC2_PORTID, 3)
|
CSL_FMK( SRIO_TXDESC2_SSIZE, SSIZE_256B)|
CSL_FMK( SRIO_TXDESC2_MAILBOX, 0);
TX_DESCP0_0->TXDESC3 =
CSL_FMK( SRIO_TXDESC3_SOP,1 )
|
CSL_FMK( SRIO_TXDESC3_EOP,1 )
|
CSL_FMK( SRIO_TXDESC3_OWNERSHIP,1 )
|
CSL_FMK( SRIO_TXDESC3_EOQ,1 )
|
CSL_FMK( SRIO_TXDESC3_TEARDOWN,0 )
|
CSL_FMK( SRIO_TXDESC3_RETRY_COUNT,0 )|
CSL_FMK( SRIO_TXDESC3_MESSAGE_LENGTH,MLEN_512DW );
TX_DESCP0_1->TXDESC0 =
CSL_FMK( SRIO_TXDESC0_N_POINTER, 0);
//end of message
TX_DESCP0_1->TXDESC1 =
CSL_FMK( SRIO_TXDESC1_B_POINTER,(int )&xmtBuff2[0] );
TX_DESCP0_1->TXDESC2 =
CSL_FMK( SRIO_TXDESC2_DESTID, 0xBEEF)
|
CSL_FMK( SRIO_TXDESC2_PRI, 1)
|
CSL_FMK( SRIO_TXDESC2_TT, 1)
|
CSL_FMK( SRIO_TXDESC2_PORTID, 3)
|
CSL_FMK( SRIO_TXDESC2_SSIZE, SSIZE_256B)|
CSL_FMK( SRIO_TXDESC2_MAILBOX, 1);
TX_DESCP0_1->TXDESC3 =
CSL_FMK( SRIO_TXDESC3_SOP,1 )
|
CSL_FMK( SRIO_TXDESC3_EOP,1 )
|
CSL_FMK( SRIO_TXDESC3_OWNERSHIP,1 )
|
CSL_FMK( SRIO_TXDESC3_EOQ,1 )
|
CSL_FMK( SRIO_TXDESC3_TEARDOWN,0 )
|
CSL_FMK( SRIO_TXDESC3_RETRY_COUNT,0 )|
CSL_FMK( SRIO_TXDESC3_MESSAGE_LENGTH,MLEN_512DW );
62
Serial RapidIO (SRIO)
SPRUE13A – September 2006